Rocker box



FIG. 1 is a perspective view of a rocker box of the present invention showing my new design;

FIG. 2 is a top plan view thereof on a smaller scale;

FIG. 3 is a left side view thereof on a smaller scale, the right side view being a mirror image thereof;

FIG. 4 is a front elevational view thereof on a smaller scale; and,

FIG. 5 is a rear elevational view thereof on a smaller scale.

Broken lines used in FIG. 1 show the environment in which the present invention may be used, but do not form a part of the claimed design. The bottom surface of the rocker box is not shown, as it forms no part of the claimed design. 

The ornamental design for a rocker box, as shown and described. 